/* v 260520.2129 UTC */

.sudoku-page {
    --sudoku-night: #090f10;
    --sudoku-slate: #121f22;
    --sudoku-slate-2: #1a2b2e;
    --sudoku-blueprint: #203a3f;
    --sudoku-paper: #efe0bd;
    --sudoku-paper-light: #fff3d6;
    --sudoku-paper-muted: #d4bf91;
    --sudoku-ink: #152325;
    --sudoku-cream: #f5e7c6;
    --sudoku-brass: #c89142;
    --sudoku-brass-light: #e6be76;
    --sudoku-sage: #9fb29b;
    --sudoku-cell: #f1dfb6;
    --sudoku-cell-alt: #e7d1a1;
    --sudoku-given: #b7c4a9;
    --sudoku-selected: #e8b95d;
    --sudoku-peer: #d8c79d;
    --sudoku-same: #abc4b8;
    --sudoku-error: #c66b5d;
    --sudoku-line: rgba(13, 22, 24, 0.45);
    --sudoku-heavy: #0c1517;
    background:
        radial-gradient(circle at 22% 16%, rgba(200, 145, 66, 0.2), transparent 26%),
        radial-gradient(circle at 82% 74%, rgba(32, 58, 63, 0.52), transparent 34%),
        linear-gradient(rgba(245, 231, 198, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245, 231, 198, 0.025) 1px, transparent 1px),
        linear-gradient(145deg, #070b0c, #142123 58%, #0a1011);
    background-size: auto, auto, 34px 34px, 34px 34px, auto;
    color: var(--sudoku-cream);
}

.sudoku-main {
    min-height: 100svh;
    position: relative;
    overflow: hidden;
}

.sudoku-main::before {
    content: "81";
    position: fixed;
    right: -0.02em;
    top: 0.02em;
    z-index: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(9rem, 26vw, 25rem);
    line-height: 0.8;
    letter-spacing: -0.12em;
    color: rgba(245, 231, 198, 0.055);
    transform: rotate(-7deg);
    pointer-events: none;
}

.sudoku-main::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.34;
    background:
        linear-gradient(120deg, transparent 0 45%, rgba(230, 190, 118, 0.07) 45% 46%, transparent 46%),
        radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.34) 78%);
}

.sudoku-shell {
    position: relative;
    z-index: 1;
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: clamp(3rem, 7vw, 6rem) 0;
}

.sudoku-intro {
    max-width: 820px;
    margin: 0 auto clamp(1.5rem, 4vw, 2.6rem);
    text-align: center;
}

.sudoku-eyebrow {
    margin: 0 0 0.8rem;
    color: var(--sudoku-brass-light);
    font-weight: 900;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.78rem;
}

.sudoku-intro h1 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(3.8rem, 10.5vw, 8rem);
    line-height: 0.86;
    letter-spacing: -0.07em;
    color: var(--sudoku-paper-light);
    text-transform: uppercase;
    text-shadow: 0 20px 40px rgba(0, 0, 0, 0.36);
}

.sudoku-intro p {
    margin: 1rem auto 0;
    max-width: 680px;
    line-height: 1.75;
    font-size: clamp(1rem, 2.2vw, 1.18rem);
    color: rgba(245, 231, 198, 0.76);
}

.sudoku-layout {
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(260px, 340px);
    gap: clamp(1.2rem, 3vw, 2.2rem);
    align-items: start;
}

.sudoku-board-panel,
.sudoku-controls {
    background:
        linear-gradient(145deg, rgba(245, 231, 198, 0.1), rgba(245, 231, 198, 0.035)),
        rgba(10, 16, 17, 0.74);
    border: 1px solid rgba(245, 231, 198, 0.16);
    border-radius: 34px;
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.46);
    backdrop-filter: blur(10px);
}

.sudoku-board-panel {
    padding: clamp(1rem, 3vw, 2rem);
}

.sudoku-status {
    min-height: 1.4em;
    margin-bottom: 1rem;
    color: var(--sudoku-brass-light);
    font-weight: 900;
    letter-spacing: 0.04em;
    text-align: center;
}

.sudoku-board {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    width: min(100%, 660px);
    aspect-ratio: 1;
    margin: 0 auto;
    border: 5px solid var(--sudoku-heavy);
    border-radius: 18px;
    overflow: hidden;
    background: var(--sudoku-heavy);
    box-shadow:
        0 18px 42px rgba(0, 0, 0, 0.38),
        0 0 0 1px rgba(245, 231, 198, 0.08);
}

.sudoku-cell {
    position: relative;
    width: 100%;
    height: 100%;
    border: 1px solid var(--sudoku-line);
    display: grid;
    place-items: center;
    background:
        linear-gradient(rgba(255, 255, 255, 0.06), transparent),
        var(--sudoku-cell);
    color: var(--sudoku-ink);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.2rem, 4.8vw, 2.4rem);
    font-weight: 800;
    text-align: center;
    outline: none;
    caret-color: transparent;
    cursor: pointer;
    transition: background 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
}

.sudoku-cell:nth-child(3n) { border-right-width: 3px; }
.sudoku-cell:nth-child(9n) { border-right-width: 1px; }
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) { border-bottom-width: 3px; }

.sudoku-cell.given {
    background:
        linear-gradient(rgba(255, 255, 255, 0.08), transparent),
        var(--sudoku-given);
    color: #102022;
    cursor: default;
}

.sudoku-cell.selected {
    background: var(--sudoku-selected);
    box-shadow: inset 0 0 0 4px var(--sudoku-brass), 0 0 18px rgba(230, 190, 118, 0.24);
    z-index: 2;
}

.sudoku-cell.peer {
    background: var(--sudoku-peer);
}

.sudoku-cell.same {
    background: var(--sudoku-same);
    color: #0f2a2d;
}

.sudoku-cell.error {
    background: #d99486;
    color: #5f1a14;
}

.sudoku-cell.solved {
    background: #c2d7bf;
}

.sudoku-value {
    line-height: 1;
}

.sudoku-notes-grid {
    position: absolute;
    inset: 4px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    color: rgba(21, 35, 37, 0.62);
    font-family: "Segoe UI", Tahoma, sans-serif;
    font-size: clamp(0.42rem, 1.5vw, 0.78rem);
    font-weight: 900;
    line-height: 1;
    pointer-events: none;
}

.sudoku-note-mark {
    display: grid;
    place-items: center;
}

.sudoku-note-mark.present {
    color: rgba(21, 35, 37, 0.85);
}

.sudoku-controls {
    padding: clamp(1.2rem, 3vw, 1.8rem);
    position: sticky;
    top: 92px;
}

.sudoku-controls label {
    display: block;
    margin-bottom: 0.45rem;
    color: var(--sudoku-brass-light);
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sudoku-controls select {
    width: 100%;
    min-height: 46px;
    padding: 0.75rem 0.9rem;
    border: 1px solid rgba(245, 231, 198, 0.18);
    border-radius: 14px;
    background: rgba(245, 231, 198, 0.92);
    color: var(--sudoku-ink);
    font: inherit;
    font-weight: 800;
}

.sudoku-primary,
.sudoku-notes-toggle,
.sudoku-actions button,
.sudoku-pad button {
    border: 0;
    border-radius: 14px;
    font: inherit;
    font-weight: 900;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.sudoku-primary {
    width: 100%;
    margin: 1rem 0 0.7rem;
    padding: 0.95rem 1rem;
    color: #fff8ec;
    background: var(--sudoku-blueprint);
    box-shadow: 0 7px 0 #102326, 0 18px 28px rgba(0, 0, 0, 0.24);
}

.sudoku-notes-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    width: 100%;
    margin: 0 0 1.1rem;
    padding: 0.88rem 1rem;
    color: var(--sudoku-ink);
    background: var(--sudoku-paper-muted);
    box-shadow: 0 6px 0 #88764f;
}

.sudoku-notes-toggle.active {
    color: #fff8ec;
    background: var(--sudoku-brass);
    box-shadow: 0 6px 0 #8b6428;
}

.notes-dot {
    width: 0.72rem;
    height: 0.72rem;
    border-radius: 50%;
    background: rgba(21, 35, 37, 0.42);
}

.sudoku-notes-toggle.active .notes-dot {
    background: #fff8ec;
    box-shadow: 0 0 0 4px rgba(255, 248, 236, 0.2);
}

.sudoku-pad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.55rem;
    margin: 0 0 1rem;
}

.sudoku-pad button {
    aspect-ratio: 1;
    color: #fff8ec;
    background: #284b50;
    box-shadow: 0 5px 0 #13292c;
    font-size: 1.25rem;
}

.sudoku-pad.notes-active button {
    background: #806232;
    box-shadow: 0 5px 0 #4c391c;
}

.sudoku-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.55rem;
}

.sudoku-actions button {
    min-height: 44px;
    padding: 0.65rem 0.5rem;
    color: var(--sudoku-ink);
    background: var(--sudoku-paper-muted);
    box-shadow: 0 5px 0 #88764f;
    font-size: 0.9rem;
}

.sudoku-primary:hover,
.sudoku-notes-toggle:hover,
.sudoku-actions button:hover,
.sudoku-pad button:hover {
    transform: translateY(-2px);
}

.sudoku-note {
    margin: 1.2rem 0 0;
    color: rgba(245, 231, 198, 0.7);
    line-height: 1.55;
    font-size: 0.95rem;
}

.sudoku-footer-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

@media (max-width: 860px) {
    .sudoku-layout {
        grid-template-columns: 1fr;
    }

    .sudoku-controls {
        position: static;
    }
}

@media (max-width: 560px) {
    .sudoku-shell {
        width: min(100% - 1rem, 1180px);
        padding-top: 2.5rem;
    }

    .sudoku-board-panel,
    .sudoku-controls {
        border-radius: 24px;
    }

    .sudoku-board {
        border-radius: 12px;
        border-width: 4px;
    }

    .sudoku-cell {
        font-size: clamp(1rem, 7vw, 1.8rem);
    }

    .sudoku-notes-grid {
        inset: 3px;
        font-size: clamp(0.36rem, 2.3vw, 0.66rem);
    }
}